import type { I18nTextDescriptor } from './core.js';
/**
 * Per field, the locales that are UNCHANGED round-tripped densify fills — i.e.
 * marked filled on the prior record AND identical in the incoming record.
 * These are exempt from write-time script enforcement (they are derived copies,
 * not authored text). Slots the user changed are NOT exempt (validated as authored).
 */
export declare function computeExemptFills(prior: Record<string, unknown> | undefined, incoming: Record<string, unknown>, fields: Record<string, I18nTextDescriptor>): Map<string, Set<string>>;
/**
 * Mutate `record` in place: fill empty declared-language slots for each
 * densify-enabled field from the field's substitute chain, recompute unchanged
 * prior fills, clear marks for slots that became authored, and write the
 * resulting `_i18nFilled` marker (removed when empty).
 *
 * `prior` is read-only — it is never mutated.
 *
 * Provenance uses value-equality (decision A): a slot counts as an unchanged
 * fill when it was prior-marked AND its value still equals the prior value. A
 * consequence is that re-authoring a value byte-identical to the existing fill
 * keeps it classified as a fill (the visible value is unchanged either way; the
 * slot stays script-exempt and will auto-refresh if its source later changes).
 * This is inherent to value-equality provenance, not a bug.
 */
export declare function densify(record: Record<string, unknown>, prior: Record<string, unknown> | undefined, fields: Record<string, I18nTextDescriptor>): void;